Steam-engine.



No. 770,985. PATENTED SEPT. 27, 1904. B. M. SOHAUMAN.

STEAM ENGINE.

APPLICATION FILED MAR. 10, 1904.

N0 MODEL. 3 SHEETSSHBET 1.

WI TIIE-SSES ATTORNEY.

No. 770,985. PATENTED SEPT. 27, 1904.. B. M. SGHAUMAN. STEAM ENGINE.

APPLICATION FILED MAR. 10, 1904.

NO. MODEL. 6

3 SHEETS-SHEET 2.

WITNESSES:

' INVENTOH flivmaummz l TTORIVE).

PATENTED SEPT. 27, 1904.

B. M. SGHAUMAN. STEAM ENGINE.

APPLIUATION FILED MAR.10, 1904.

3 SHEETS-SHEET 3.

N0 MODEL.

WITNESSES: I/{VEN ron firozl azaxjdaaman ATTORNEY.

UNITED STATES Patented September 27, 1904:.

PATENT OFFICE.

BROR MAX SCHAUMAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF, ELLWOOD BEVAN, AND VANCE W. MILLS, OF PHILA- DELPHIA, PENNSYLVANIA.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 770,985, dated September 27, 1904:.

Application filed March 10, 1904.

T alZ whom it may concern:

Be it known that I, BROR MAX SOHAUMAN, a subject of the King of Sweden and Norway, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Engines, of which the following is a specification.

My invention relates to improvements in that class of steam-engines known as rotarypiston engines; and my improvements embody a construction by which the wear upon the piston will be materially reduced and the joints between the stationary and movable 5 parts rendered practically tight.

My invention embodies, further, details of construction applicable generally to steamengines,but capable of being embodied in other like types of motors.

The preferred embodiment of my present invention is illustrated in the accompanying drawings, wherein Figure 1 represents a side elevation of my improved steam-engine; Fig. 2, an end eleva- 5 tion looking from the left-hand side of Fig. 1;

Fig. 3, a vertical section taken on the line 3 3 of Fig. 2; Fig. 4:, a longitudinal section on line 44 of Figs. Qand 3; Fig. 5, adetached perspective view of the plunger; Fig. 6, a perspective 3 view of one of the end packing-rings; Fig. 7,

a perspective view of one of the cylinderheads, and Fig. 8 a perspective view of one end of the rotary piston.

Referring to the reference-letters of the drawings, A represents the cylinder of my engine, in which is arranged a piston B, having a shaft B supported by the cylinder-heads A and A provided with glands or stuflingboxes at and (0 The cylinder A is provided 4 with a receiver or steam-chest A provided with a steam-supply pipe (0 leading to a compartment (0*, which projects downwardly at its two extremities and terminates in ports a and. a, leading into the ends of the cylinder A. The

receiver A is also provided with a radiallyslotted opening a, extending the full Width of the receiver, which is adapted to receive a correspondingly former plunger A whose func- Serial No. 197,495. (No model.)

tion is to divide the cylinder into two parts, and thus separate the pressure side X from the exhaust side X. The plunger A, which is better illustrated in Fig. 5, is provided at the lower end with a shoe A fulcrumed to the plunger at a point a and with arms a a, fulcrumed to the plunger at one end by a rod (4 and at the other connected to a shaft a. The arms a a are contained in an exhaustchamber A, from the upper wall or cover of which projects a discharge-pipe a. The plunger is caused to closely engage the end walls of the receiver A and thus form a practically steam-tight joint by means of metallic packing-strips a (0 located in recesses a a and normally pressed outward by springs a, surrounding fixed plungers a (4 The plunger is cut away on one side, forming a groove (1,", the purpose of which is to allow ample space for steam to reach the back of the plunger, so that it will not be retarded in its downward movement, which is further prevented by making the slotted opening a wider than the greatest width of the plunger, as shown in Fig. 3.

The piston B has a central eccentric portion B and end disks or heads B B which are concentric with respect to the shaft B. The ends of the cylinder A adjacent to the pistonheads B B are counterbored, leaving ample space for packing-rings C and C, which are in the form of double split rings recessed at the top at 0 (see Fig. 6) to clear the depending portion of the receiver A Between the piston-heads B and cylinder-heads A on either side of the cylinder A is left sufficient space for the passage of steam from the ports a which passing through said ports and over the packing-rings C C enters this space and from thence enters ports or openings Z) 7) in the heads B B. The eccentric portion B of the piston does not come directly in contact with the inner wall of the cylinder A, but is grooved out at the point of nearest approach and provided with a shoe B fulcrumed at a point 6". This shoe bears against the inner wall of the cylinder and is kept in close contact by the admission of steam dil I V m mu" rectly below the shoe on one side of its fulcrum point, which entering the ports 5 Z) traverses the groove below the shoe and escapes through the space 6* between the shoe and piston into the space X. In order to prevent the steam from blowing through from the pressure side X to the exhaust side X when the shoe B is adjacent to the chamber A the cylinder-heads A and A are provided with plates D D, resting in grooves D D, which plates cover the ports 7) b at this point and cut off the supply of steam until the shoe B has passed over into the pressure side X. The plates D D are provided with openings to receive plungers (Z (Z around which are coiled springs S S to retain these plates in position against said plates. The cylinder-heads A and A rest against shoulders c and 6', formed by an outer counterbore at both ends of the cylinder A, and these heads are firmly held against the shoulders by threaded rings E and E, which are adapted to correspondingly-threaded ends of the cylinder A.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. A steam-engine comprising a cylinder, an eccentric piston, a plunger working in conjunction with the piston to separate the livesteam area from the exhaust area of the cylinder, a receiver provided with ports leading to the ends of the cylinder and concentric heads connected to the piston having ports leading from the outer ends of the cylinder to the periphery of the piston, substantially as specified.

2. A steam-engine comprising a cylinder, a rotary piston mounted therein, having steamports, passing from the ends to the periphery thereof, a receiver mounted upon the cylinder having steam-ports leading to the ends of the cylinder, and an exhaust-port leading from the center of the cylinder, a plunger suitably guided in the receiver, and a shoe fulcrumed to the piston and adapted to engage the inner wall of the cylinder, substantially as specified.

3. A steam-engine comprising a cylinder, a rotary piston mounted therein provided with steam-ports, plates mounted at the ends of the cylinder adapted at predetermined intervals to close said ports, a receiver provided with steam inlet and exhaust ports and a plunger gguded in the receiver, substantially as speci- 4:. A steam-engine comprising a cylinder, a rotary piston mounted therein, provided with steam-ports, a shoe fulcrumed to the piston and having one of its sides arranged above the steam-inlet passage of the piston, a receiver provided with inlet and discharge ports and a plunger guided in said receiver, substantially as described.

5. A steam-engine comprising a cylinder, a rotary piston mounted therein and provided with steam-ports, a shoe fulcrumed to the piston in such a manner as to be forced outward against the inner wall of the cylinder by the incoming pressure of steam, a receiver provided with inlet and discharge passages, a plunger guided in the receiver, and a shoe fulcrumed to the end of the plunger and adapted to bear against the piston as it revolves, substantially as specified.

6. A steam-engine comprising a cylinder, a rotary piston composed of concentric end disks and an eccentric middle section, the former of which are provided with steam-inlet ports, a receiver provided with inlet and discharge ports and a plunger guided in said receiver, substantially as described.

7. A steam-engine comprising a cylinder counterbored at its ends, a receiver provided with inlet-ports and a discharge-port, the former terminating in the counterbored portion of the cylinder, a piston composed of concentric end disks and an eccentric middle portion, the former of which have steam-inlet passages, leading to the middle portion, packingrings surrounding the end disks and adapted to beheld in place by the surrounding steampressure and a plunger guided in the receiver, substantially as specified.

8. A steam-engine, comprising a cylinder, a rotary piston mounted therein having steaminlet ports, a receiver provided with inlet and discharge ports, a plunger guided in said receiver and springactuated packing plates guided in the ends of the plunger, substantially as described.

9. A steam-engine, comprising a cylinder, a rotary piston mounted therein having steaminlet ports, a receiver provided with inlet and discharge passages, a segmental plunger working in the receiver and arms connected at one end to a fulcrum-shaft and at the other to the plunger to guide the same, substantially as described.

In testimony whereof I aflfix my signature in presence of two witnesses.-

BROR MAX SCHAUMAN.

Witnesses:

DAVID S. WILLIAMs, NORMAN W. ELLIOTT. 

